<template>
  <div>
    <!-- Header 区域 -->
    <van-nav-bar fixed title="文章详情" left-arrow @click-left="$router.back()" />
    <!-- 加载中 -->
    <van-loading color="#0094ff" vertical v-if="Object.keys(ArticelDetailObj).length === 0">文章加载中...</van-loading>
    <div v-else>
      <!-- 文章信息区域 -->
      <div class="article-container">
        <!-- 文章标题 -->
        <h1 class="art-title">{{ArticelDetailObj.title}}</h1>

        <!-- 用户信息 -->
        <van-cell center :title="ArticelDetailObj.aut_name" :label="formatDate(ArticelDetailObj.pubdate)">
          <template #icon>
            <img :src="ArticelDetailObj.aut_photo" alt="" class="avatar">
          </template>
          <template #default>
            <div>
              <van-button type="info" size="mini" v-if="ArticelDetailObj.is_followed" @click="followedFn(true)">已关注</van-button>
              <van-button icon="plus" type="info" size="mini" plain v-else @click="followedFn(false)">关注</van-button>
            </div>
          </template>
        </van-cell>

        <!-- 分割线 -->
        <van-divider></van-divider>

        <!-- 文章内容 -->
        <div class="art-content" v-html="ArticelDetailObj.content"></div>

        <!-- 分割线 -->
        <van-divider>End</van-divider>

        <!-- 点赞 -->
        <div class="like-box">
          <van-button icon="good-job" type="danger" size="small" v-if="ArticelDetailObj.attitude === 1" @click="likeFn(true)">已点赞</van-button>
          <van-button icon="good-job-o" type="danger" plain size="small" v-else @click="likeFn(false)">点赞</van-button>
        </div>
      </div>
      <!-- 文章评论区域 -->
      <CommentList></CommentList>
    </div>
  </div>
</template>

<script>
import { getNewsDetailApi, userUnFollowedApi, userFollowedApi, likeArticelApi, unLikeArticelApi } from '@/api'
import { timeAgo } from '@/utils/timeFormat.js'
import CommentList from './CommentList.vue'
export default {
  name: 'Detail',
  data() {
    return {
      ArticelDetailObj: {} // 文章详情对象

    }
  },
  async created() {
    const res = await getNewsDetailApi({
      art_id: this.$route.query.art_id
    })
    this.ArticelDetailObj = res.data.data
  },
  methods: {
    formatDate: timeAgo, // 格式化时间的方法
    // 作者的关注与取消关注
    async followedFn(bool) {
      if (bool) { // 点击在已关注标签上
        // 取消关注
        this.ArticelDetailObj.is_followed = false
        // 把数据同步到后端 调取消关注用户的接口
        await userUnFollowedApi({ userId: this.ArticelDetailObj.aut_id })
      } else { // 点击在关注标签上
        // 关注作者
        this.ArticelDetailObj.is_followed = true
        // 把数据同步到后端 调关注用户的接口
        await userFollowedApi({ userId: this.ArticelDetailObj.aut_id })
      }
    },
    // 文章的点赞与取消点赞
    async likeFn(bool) {
      if (bool) { // 点在已点赞上
        // 显示关注按钮
        this.ArticelDetailObj.attitude = 0
        // 调对文章取消点赞接口 数据同步到后台
        await unLikeArticelApi({ artId: this.ArticelDetailObj.art_id })
      } else { // 点在点赞按钮上
        // 显示已点赞按钮
        this.ArticelDetailObj.attitude = 1
        // 调对文章点赞接口 数据同步到后台
        await likeArticelApi({ artId: this.ArticelDetailObj.art_id })
      }
    }
  },
  components: {
    CommentList
  }
}
</script>

<style scoped lang="less">
.article-container {
  padding: 10px;
  margin-top: 46px;
}
.art-title {
  font-size: 16px;
  font-weight: bold;
  margin: 10px 0;
}

.art-content {
  font-size: 12px;
  line-height: 24px;
  width: 100%;
  overflow-x: scroll;
  word-break: break-all;
  /deep/ img {
    width: 100%;
  }
  /deep/ pre {
    white-space: pre-wrap;
    word-wrap: break-word;
  }
}

.van-cell {
  padding: 5px 0;
  &::after {
    display: none;
  }
}

.avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: #f8f8f8;
  margin-right: 5px;
  border: none;
}

.like-box {
  display: flex;
  justify-content: center;
}
// 文章详情的背景色
/deep/ .van-nav-bar {
  background-color: #007bff;
  // 左侧返回字体图标颜色
  .van-icon {
    color: #fff;
  }
}
// 加载中的样式
.van-loading {
  padding-top: 46px;
}
</style>
